I have a 3831x12 data set in Excel that I'm trying to import into Matlab. I'm trying to plot(x,y) with x being the date (1st column) and y being the weight (fourth column). However, each day I have 16 different subjects, who each need their weight plotted against the date. Therefore, I want to import every 16 cells for y. How can I do this? Right now my code is simply: